c语言矩阵乘法实验报告,c语言矩阵相乘

最新推荐文章于 2022-03-08 14:18:20 发布

转载最新推荐文章于 2022-03-08 14:18:20 发布 · 225 阅读

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#c语言矩阵乘法实验报告

这段代码演示了如何从文件中读取二维矩阵，并进行矩阵乘法操作。使用`freopen`函数重新定向`stdin`和`stdout`，分别读取两个3x3矩阵并计算结果，最后将结果矩阵写入文件。

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程序清单

#include&nbsp

int&nbspmain(void)

{

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspchar&nbsp&nbsp&nbsp&nbspa[2][3];

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspchar&nbsp&nbsp&nbsp&nbspb[3][3];

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspchar&nbsp&nbsp&nbsp&nbspc[2][3];

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspregister&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspint&nbsp&nbsp&nbsp&nbsp&nbspi;

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspregister&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspint&nbsp&nbsp&nbsp&nbsp&nbspj;

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspfreopen("a.dat","r",stdin);

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspfor(i=0;i<2;i++)

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp{

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspfor(j=0;j<3;j++)

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspscanf("%d",&a[i][j]);

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp}

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspfreopen("b.dat","r",stdin);

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspfor(i=0;i<3;i++)

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp{

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspfor(j=0;j<3;j++)

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspscanf("%d",&b[i][j]);

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp}

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspfor(i=0;i<2;i++)

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp{

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspfor(j=0;j<3;j++)

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp{

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspc[i][j]=a[i][0]*b[0][j]+a[i][1]*b[1][j]+a[i][2]*b[2][j];

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp}

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp}

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspfreopen("c.dat","w",stdout);

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspfor(i=0;i<2;i++)

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp{

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspfor(j=0;j<3;j++)

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspprintf("%d&nbsp",c[i][j]);

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbspprintf("\n");

&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp}

}